Answer:
Differential revenue from further processing = $4.05
Explanation:
A business should process further a product if the additional revenue from the split-off point is greater than than the further processing cost.
Also note that all cost incurred up to the split-off point are irrelevant to the decision to process further .i.e $36 irrelevant to the decision to process further
The differential revenue if the desk is processed further would be the difference between the additional revenue from further process and the further processing cost.
$
Sales price after the split-off point 75
Sales price at the split-off point 65
Additional sales revenue 10
Further processing cost (5.95)
Differential revenue from further processing 4.05
Differential revenue from further processing = $4.05